Half to charles heney whiteland



(No Model.)

W. WHITELAND.

MOLD.

1\I0.360,639.A PatentedApr. 5, 1887.

N. PETERS. mwumgnpmr. wnmnglm ma UNITED STATES PATENT i OFFICE.

VILLIAM VVHITELAND, OE BOSTON, MASSACHUSETTS, ASSIGNOIt OF ONE- HALE TO CHARLES HENRY VHITELAND, OF SAME PLACE.

MOLD.

SPECIFICATION forming part of Letters Patent No. 360,639, dated April 5, 1887.

Application tiled January 25, 1887. Serial No. 225,440. (No model.)

To @ZZ whom it 77mg/ concern.-

Be it known that I, WILLIAM WHITELAND, of Boston, county of Suffolk, and State of Massachusetts, haveinvented an Improvement in Molds, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings represent-ing like parts.

rIhis invention has for its object to provide I a novel mold, whereby rings and similar articles may be cast.

In accordance with my invention a steel pattern-shaped in accordance with the ring or other article to be produced is forced into plates ot metal softer than the steel, one-half into each half of two plates, and a run-hole is cut to intersect the recess of the mold so formed. The mold-spaceis divided by aplate, which forms a wall to thus leave a gap in the ring, so that as the metal cools neither the central hub of the mold nor the ring will be injured. The faces of the mold areso shaped as to leave a vent-space between them for the passage of gases formed and eliminated in casting, and the hub is provided with a hole, or made hollow for a similar purpose and to aid in keeping it cool.

Figure l in perspective represents a mold embodying my invention; Fig. 2, a vertical cross-section of Fig. l, and Fig. 3 shows the two halves of the mold opened out.

rIhe mold is composed, essentially, ot' two metal plates, A B, preferably wrought-iron or low-grade soit steel.r These plates, at their inner sides, are substantially counterparts, each having formed in it a space, as a, which in shape corresponds with one-half of the article to be cast.

Herein Ihave shown two mold-plates shaped to produce a sealring. A hub, c, is left at the center ot' the mold-space, a run-passage, d, leading into the mold-space to receive the molten metal. The metal cast to form the ring, if the latter were cast endless, would in contracting either crack or injure the hub c, or destroy the ring. 'To obviate this I have provided the moldspace with a thin plate, e, to constitute a wall against which the metal ows, thus leaving a space in the ring, so that as the metal of the ring cools and contracts all danger of injury to the hub or to the ring is obviated. The open space in the ring left by the plate e is soldered or brazcd together after the ring is taken from the mold. The holesff of the plate A receive in them the registering-pins g g, fast to plate B, and both plates are provided with suitable transverse vent-holes, c.

To provide ample free ventpassage b'etween the two halves of the mold, I have herein shown the plate B as provided near two of its corners with slight projections or raised portions, as at h, so that the inner faces of the mold cannot come close together. One projection h might be sutiicient; butIprefer two.

The gases generated in the process ot casting, which do not escape laterally from outside the ring through the vent-passage formed by these projections, escape through the ventholes c', the said vent-passage opening also into these holes.

I do not desire to limit my invention to the production of only rings, for I may by making a mold-recess of suitable shape make other analogous articles.

I am aware that it is old to provide a mold with a series of independent channels extending entirely around the moldrecess; butI desire to limit my invention to a two-part mold, one of the plates of which is provided with a projection or projections to separate the adjacent faces of the mold, thereby leaving a free open space for the Ventilation of the mold, this being a more economical construction than has heretofore been used.

I claiml. The finger-ring lnold composed of two metal plates, A B, having separating and cooling passages parallel with and perpendicular to their faces, a central hub, a surrounding n1olding-recess, and a separatingplate, e, substantially as described.

2. A mold composed of two met-al plates, A B, having a 1nold-recess surrounding a hub, one ofthe said plates being provided with a projection or projections to separate the adjacent faces of the plates when the mold is assembled, their separation leaving a free or open space for Ventilating the nioi'd, substantially to this specification in the pies'eneeof twO sub- I :1s described. seribing Witnesses.

3. A mold composed of two metal plates A B, having lugs h h and recessed at a to foyrm WILLIAM VHTELAND' 5 hubs c, the hubs having openings c, 2111A sub- Witnesses:

stentially as described. BERNIGE J. Noyes,

In testimonywhereof I have signed my name F. CUTTER. 

